Cant strip



Oct. 15, 1929; L. E. WITTER CANT STRIP Filed Aug. 19, 1925 fm/zn of LEO. f. l/V/TTEF? 1 Patented Oct. 15, 1929 UNITED STATES PATENT. OFFICE LEO E. WITTER, OF MINNEAPOLIS, MINNESOTA, ASSIGNQR, BY DIRECT AND MESNE ASSIGNMENTS, 'I.O 'J.HE PHILIP CAREY MQNUFACTURING COMPANY, A CORPORA- TIQN OF OHIO cam: STRIP Application filed August 19, 1925. Serial No. 51,183.

This invention relatesto new and useful improvements in cant-strips or corner strips particularly adapted for use in thevconstruction of buildings and the like to providea 5 leak-proof joint between the roof and adjacent walls, and more particularly relates to a cant-strip which preferably is constructed of a'plastic waterproof material so that it will readily conform to any variation in the building and which will not be affected by expansion or contraction caused by temperature changes.

,An object of the invention is .to provide a composition cant-strip which may e manufactured from pieces of waste material such, for instance, as felt and asphalt, or from any of the waste felted or paper products usually plentiful around the mills of roofing manufacturers, thereby utilizing all such waste material and converting it into an article of' manufacture particularly adaptable for use in the construction of building roofs.

The particular object of the invention, therefore, is to provide an improved compo- 2 sition cant-strip of simple and inexpensive construction which may be manufactured at a minimum cost and will be very durable in use.

Qther objects of the invention will appear from the following description and accompanying drawings and will be pointed out in the annexed claims.

In the drawings there has been disclosed a structure designed to carry out the various objects of the invention but it is to be understood that the invention is not confined to the exact features shown as various changes may be made within the scope of the claims which follow.

. In the accompanying drawings forming part of this specification,

Figure 1 is a sectional view showing the improved cant-strip inserted in the corners between the roof and the upright wall commonly known as the parapet wall; and- Figure 2 is a perspective view showing the preferred form of the cant-strip.

The novel cant-strip featured in this invention is preferably formed so as to'be of sub- 3 stantially triangular cross-section, compristic and flexible. so that it may readily adapt it- 'self to any variations in the juncture or c0r-= row board at an angle of approximately 45 in the corners.

An important feature of this invention resides in the novel construction of the cantstrip which preferably is of composition material such, for instance, as a suitable pulp or felt impregnated and saturated with a water roofing material such as tar. By constructing the cant-strip of such material, it will be plasners between the roof deck 8 and the low upright wall 9 surrounding the roof and commonly known as the parapet wall.

In constructing the roof. the cant-strip is seated in the corners surrounding the roof deck 8 with its right-angle faces seated against the roof deck and the parapet wall as shown in Figure 1. The roofing material or paper 11 is then laid upon the roof deck and over the concave face 5 of the cant-strip with its edge 12 placed against the side of the parapet wall 9 above the cant-strip as shown. The-edge 12 of the roofing material is suitably secured to the wall 9 by a suitable water proof material such as tar. Before placing the paper-upon the roof deck and against the concave face of the cant-strip, thesurfaces thereof are preferably covered wit-h a coating of tar or asphalt to provide a binder or means of securing the paper to the roof deck, which is common practice in structures of this kind.

The outer face of the cant-strip may be either straight or concaved as shown. It is preferably formed by moulding in a die or press and may be made from scrap or waste pieces of felt or asphalt or from any of the waste felted or paper products from mills of roofing manufactures. Also by thus con- 100 to thermal and moisture changes will be less than that of wood so that it'will not tend to pull away from the roof corners. In use the felt covering for the roof is preferably arranged-to extend upwardly over the concave or straight forward face of the cant-strip and a short distance up the-surface of the wall 9 as shown in Figure 1. By thus mounting .the cant-strip in the roofcorner, the roofing material need not be nailed'to the roof deck or to the cant-strip. If desired, the cantstrip may also be cemented by. means of.

asphalt to the roof deck and the parapetwall.

It will thus form a substantially continuous roofing structure, the asphalt" providing an intimate connection betweenthe roofing and the cant-strip.-

By the employment of this novel cant-strip danger of the roofing material cracking at the juncture between the roof deck and the upper surface of the roof, said cant-strip and roofing having substantially the same composition. v p

In witness whereof, I have hereunto set my hand this 14th day of August, 1925.

LEO E. WITTER.

parapet wall as a result of expansion and con- I traction of the Itsconstruction, as hereinbefore stated, is also such that it may be manufactured from pieces of scrap roofing material such as felt and tar, thereby providing a cant-strip which maybe manufactured at a minimum cost and which will be water proof and pliable and will positively prevent the roofing material from cracking or fracturing when seated thereon as a result of thermal and moisture changes.

I claim as my invention:

1. The combination with a 'roof and parapet wall a cant-strip fitting into the angle between the roof and the wall, said cant-strip being composed of waste roofing material and a sheet of roofing material having one end secured to the wall above the cant-strip and engaging the outer surface of the strip and the upper surface of the roof.

2. The combination with a roof and parapet wall a cant-strip fitting into the angle between the roof and the wall, said can'tstrip being composed of roofing felt, and

asphalt, and a sheet of roofing material having one end secured to the wall above the cant-strip and engaged against and secured to the outer surface of the stripand the upper surface ofthe roof.

3. The combination with a roof and parapet wall a cantstrip fitting into the angle between the roof and the wall, said cantstrip being composed of waste roofing material, and a sheet of roofing material having one end secured to the wall above the cantstrip, and engaging the outer surface of the strip and the upper surface of the roof, the

- meeting surface of the cant-strip and sheet, parapet wall and sheet, and roof and sheet, I

cant-strip providing a sup" porting means therefor at such uncturet 

